递推公式是指数列的任意连续若干项所满足的关系式(比较常见的通常是给出数列中的相邻两项间的关系),由递推公式和相应的前若干项可以确定一个数列.利用递推公式法给出数列称为递推数列.纵观历年来全国各地的高考试题可以发现,递推数列题目屡见不鲜,其中求某些形式较为简单的递推数列的通项是近年高考的热点.解决此类问 The recurrence formula is a relational expression satisfied by any consecutive item of the index column (the more common one is usually the relationship between two adjacent items in a given series). The recursion formula and the corresponding first several items can determine a sequence. Recursive formula method is used to give a series called recursive sequence. Throughout the years of high school examination questions across the country can be found, recurring series of topics are common, in which seeking some form of a simple recursive series of general terms is the recent college entrance examination Hot spots. Solving such questions